真空二次还原精炼法制备低氧高钛铁合金的研究  

Research on Preparation of High Titanium Ferroalloy with Low Oxygen through Vacuum Secondary Reduction Refining

作　　者：豆志河[1] 张廷安[1] 姚永林[1] 张含博[1] 张志琦[1] 牛丽萍[1] 赫冀成[1] 

机构地区：[1]东北大学多金属共生矿生态化利用教育部重点实验室,辽宁沈阳110004

出　　处：《稀有金属材料与工程》2012年第3期420-425,共6页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50874027;50644016;50704011);国家"973"项目(2007CB613504);中央高校基本科研业务费(90402015)

摘　　要：以铝热法生产的高钛铁为原料,以Al为还原剂进行真空还原精炼制备低氧高钛铁。研究了精炼温度、精炼时间等因素对精炼效果的影响,采用XRD、SEM及化学元素分析等手段对高钛铁合金进行了表征。结果表明:精炼后的高钛铁主要含有TiFe2、Fe2TiO5、TiO、Al2O3、TiAl、Fe0.942O等相,精炼后合金的微观结构均匀致密,夹杂物得到有效去除,氧含量大幅降低。但精炼温度过高,精炼时间过长,会恶化精炼效果。精炼后合金中钛含量(质量分数)为(69.00～71.00)%,铝含量低于2.50%,硅含量低于2.63%,氧含量低于3.52%,完全符合优质高钛铁的技术指标。The vacuum reduction refining was used to prepare the high titanium ferroalloy with low oxygen, using the high titanium ferroalloy prepared by an aluminum thermal method as raw materials, and A1 as the reducing agent. Effects of the refining temperature and time on the refining result were studied, and the high titanium ferroalloy was characterized by XRD, SEM and chemical elemental analysis. The results show that the refined high titanium ferroalloy consists mainly of TiFe2, Fe2TiO5, TiO, Al2O3, TiA1 and Fe0.9420 phases. The microstructure of the refined alloy is uniform and compact, the inclusions in the alloy are effectively removed and the oxygen content decreases dramatically. However, too high refining temperature and too long refining time will worsen refining effect. The titanium content in the refined alloy is within （69.00-71.00）%, A1 content is lower than 2.50%, silicon content is lower than 2.63%, and the oxygen content is lower than 3.52%, which is fully consistent with the technical indicators of the high quality high titanium ferroalloy.

关 键 词：低氧高钛铁 真空还原精炼 二次还原 

分 类 号：TF64[冶金工程—钢铁冶金]